Movable endless grate.



3 SHEETS-SHEET 1.

PATENTED PEB. 14, 1905.

No. 782,213. PATENTED FEB. 14. 1905.

J. P. BARNES.

MOVABLE ENDLESS GRA'IE.

APPLICATION FILED 00T. 6, 1903.

"-Hmilm PATENTED FEB. 14, 19075.

J. P. BARNES.

MOVABLE ENDLESS GRATE.

APPLICATION FILED 00T. 3. 1903.

3 SHEETS-SHEET 3.

' d T3155 l UNITED STATES Patented February 14, 1905.

ATENT OFFICE.

J OSIPH P. BARNES, OF ROCKFORD, ILLINOIS, ASSIGNOR TO W. F. & JOHN BARNES ILLINOIS.

COMPANY,

OF ROOKFORI), ILLINOIS, A OORPORA' ION IVIOVABLE. ENDLESS GRATE.

SPECIFICATION forming part of Letters Patent No. 782,213, dated February 14, 1905.

Application filed October 5, 1903. Serial No` 176,013.

To HJ] wlw/1t '11b/ty concern/r Be it known that I, Josera PBAnNns, a citizen of the United States, residing at Rock ford, in the county of lVinnebago and State of Illinois, have invented certain new and useful Improvements in Movable Endless (rates, of which the following is a specification.

The object of this invention is to form a seal between the lire-chamber and ash-pit at the time the ashes are being' transferred from the tire-chamber to the ash-pit in order that air from the ash-pit ma)Y be excluded `from gaining access to the lire-chamber except through the grate or such other'openings as are employed for required draft.

In the accompanying drawings, Figure I is a vertical lengthwise section. Fig. 2 isa plan view in which the grate and its supports are removed. Fig. 3 is a vertical transverse section on dotted line a, Fig. l. Fig. A is an isometrical representation of the drum around the shaft at the discharge end of the g'rate.

The side plates I and 2 support two shafts 3 and I, and between the plates'is located a grate composed of links pivotallv connected. The drive-shaft 3 supports sprocketwheels 6, which engage the links ot the chain. rlhe shaft supporting the discharge end of the grate in this instance supports four sprocketwheels T, which engage the links of the chain, and between the sprocket-wheels are located drums S, having sides corresponding in number to the number of teeth in the sprocketwheels. The links of the chain rest in contact with the sides of the drums in rounding the discharge end of the grate. Along' the inside of each side plate extends a projection 9, closely fitting the outside links of the chain in order that all air must pass through the grate. The grate is supported between the shafts by the cross-tubes l0. A hopper Il is located over the grate at one end. At the discharge end of the grate is located a vertical partition I2, having a slot 13 near its upper end. Above the slot 13 is located a receptacle 14e. From the inner face of each of the side plates extend two supports 15 and 1G for rollers 1T and IS and two projections I9 and 20, overhanging the rollers, leaving a space between the rollers and projections. A plate 21 is supported by the upper rollers of each side plate and movable thereon Vfrom the position shown in solid lines into the position shown in dotted lines. An arm 22 is supported by the side plate 2, and a rod 23 forms a connection between one end of the plate QI and the arm. A brace-rod 21. forms a connection between the rod Q3 and the other end of the plate. A handle has a connection with the arm 22 outside of the side plate. By means of this handle and its connection with the plate QI the plate can be moved on its rollersupport through the slot I3. A plate 26 is supported by the lower rollers of each side plate and movable thereon from the position shown in solid lines into the position shown in dotted lines. An arm 2T is supported b v the side plate 2, and a rod 28 forms a connection between one end of the plate and the arm. A brace-rod 29 forms a connection between the rod and other end of the plate. A handle 30 has a connection with the arm Q7 outside of the side plate. By means of this handle 30 and its connection with the plate 26 the plate can be moved on its roller-support. 'Ihe brickwork 3l in connection with the vertical partition l2 forms a passa, );ewa5T 3Q between the lire chamber and the ash -pit through which the ashes discharged from the grate fall.

In use the plate 26 is moved across the passage-way, as shown in solid lines, Fig. l, of the drawings, and the plate 21 is drawn back free of the passage-way.

It will be noticed that air can only gain access to the lire-chamber through the grate, as the drums 8 close the openings in the grate at the discharge end thereof, and ashes placed in the receptacle let, over which the chain drags, close the openings in the grate as it rounds the end.

\V hen ashes have accumulated on the plate 26, the plate 2l is moved across the passageway above the plate 26. The plate 26 is then withdrawn and the ashes allowed to fall into the ash-pit, when it is again moved across the passage-way and the plate 21, retracted ready to receive ashes on the plate Q6. The

object in moving the plate 2l across the passage-way before the plate Q6 is withdrawn is to prevent air from the ash-pit gaining access to the fire-chamber while the ashes are being dumped into the ash-pit. The Linder face of the plate 26 has two lengthwise guideways 33 supporting a slide 34, provided with openings 35. A rock-shaft 36 is supported in bearings 37, depending' from the under face of the plate 26, and supports an arm 36, its free end located in a notch 39 in the end of the slide. The free end of this rock-shaft is guided by the support 40 near the feed end of the grate.' The plate 26 is provided with openings 4l. It is found in practice in the operation of chaingrates that unburned portions of the coal are discharged with the ashes by the grate and go into the ash-pit, and so far as known to me no device has been devised for burning of the unburned portions.

By the employment of the slide 34 the openings therein can be brought into register with the openings 41 in the plate 26 in order that air may be admitted to the ashes and unburned portions of the fuel supported by the plate, thereby completely consuming the unburned portions of the fuel before the ashes are dumped into the ash-pit.v By turning the rod 36 the slide can be moved lengthwise, so that the proper amount of air can be admitted through the openings 41, and as the slide is supported by the plate it will move with it when it is being withdrawn to dump the ashes.

I claim as my invention l.' The combination of a movable grate, a vertical partition located near the discharge end of the grate forming in conjunction with the end wall, a vertical passage-way, two plates spaced apart and movable across the passage-way, and supports for the plates, each plate adapted to close the vertical passageway while the other is withdrawn.

2. The combination of a movable grate, a vertical partition located near the discharge end of the grate forming in conjunction with the end wall, a vertical passage-way, two plates spaced apart and movable across the passage way. and roller supports for the plates, each plate adapted to close the vertical passage-way while the other is withdrawn.

3. The combination of a movable grate, a vertical partition located near the discharge end of the grate forming in conjunction with thc end wall, a vertical passage-way, two plates spaced apart and movable across the passage-way, supports for the plates, each plate adapted to close the vertical passageway while the other is withdrawn, a lever for each, plate and a link connecting each plate with the corresponding lever.

4. The combination of a movable endless grate, a movable support receiving ashes from the grate, and provided with openings, a slide movable -in connection with the support for closing or partially closing the openings.

5. The combination of a movable endless grate, a movable support receiving ashes from the grate and provided with openings, a slide movable in connection with the support for closing or partially closing the openings, and means for cutting off air communication between the fire-chamber and ash-pit at the discharge end of the grate while the ashes are being dumped.

6. The combination of a movable endless grate, a stationary receptacle located beneath the grate for holding ashes in contact with the grate, an imperforate drum located at the discharge end of the grate over which the grate passes, means for receiving ashes from the grate and dumping them into the ash-pit, and means for cutting olf air communication between the fire-chamber and ash-pit at the discharge end of the grate While the ashes are being dumped.

JOSEPH P. BARNES.

Vitnesses:

JOHN BARNES, A. O. BEHEL. 

